Malicious PDF — malware analysis report

Static analysis result for SHA-256 df60d7eb540d8e08…

MALICIOUS

PDF

90.1 KB Created: 2021-10-10 08:54:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 60542eb1bc983e89376e0302026d0c4d SHA-1: bda0286eca3f9939d47be6e7701cb2c8b7198cfb SHA-256: df60d7eb540d8e087b624311ceef535c383c63d2a0db3eae6e57362a44b17e30
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a ClickFix social engineering attack. It contains numerous embedded URLs, suggesting an attempt to lure the user to external sites. The document body, though heavily obfuscated, likely contains instructions to bypass security measures, potentially leading to the execution of a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://bearings.vn/images/ckeditor/files/bijigazeme.pdf In PDF document text
    • https://laps.pl/userfiles/file/86263235891.pdfIn PDF document text
    • https://sofupingame.com/calisma2/files/uploads/55776292134.pdfIn PDF document text
    • https://ehbo-oostkapelle.nl/userfiles/file/noxelisizanoworaladotok.pdfIn PDF document text
    • http://noxsun.com/jingkelun/userfiles/files/20211008182426.pdfIn PDF document text
    • http://slmj8.com/data/userfiles/files/lasedaretir.pdfIn PDF document text
    • https://bisnismedsos.com/userfiles/file/kasoga.pdfIn PDF document text
    • http://9275522-travel.com/userfiles/file/jebineludifobovapuvafav.pdfIn PDF document text
    • http://archiw.gbpopatowiec.pl/img/upload/files/76674972990.pdfIn PDF document text
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16150a7158f10f---kiduraleduxinali.pdfIn PDF document text
    • https://amigo-shop.105h.net/upload/files/gunanolizifufizupem.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/161314cc0dbec9---rivisa.pdfIn PDF document text
    • http://smartvoicesys.com/userfiles/fazuzi.pdfIn PDF document text
    • https://doosradashak.in/ci/userfiles/files/65509132667.pdfIn PDF document text
    • https://www.tocbirsen.org.tr/ckfinder/userfiles/files/21409968620.pdfIn PDF document text
    • http://www.ktgroup.co.uk/ckfinder/userfiles/files/81444606888.pdfIn PDF document text
    • http://barexkft.hu/userfiles/file/verimivubebubum.pdfIn PDF document text
    • http://bantinnhadat.com/users/files/56491799194.pdfIn PDF document text
    • https://krantiservice.com/ckfinder/userfiles/files/visarokisogujovinalafat.pdfIn PDF document text
    • https://communitytreasures-co.ravebusiness.com/gbe/useruploads/blogs/files/karapusasukiz.pdfIn PDF document text
    • http://beloezoloto.ru/userfiles/file/54824039590.pdfIn PDF document text
    • https://seeandhearbetter.ie/img/shop/contents/92244833183.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=change+hdd+to+gptPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f733.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF733 19888 bytes
SHA-256: b7261cee9bab279a7108375d1d3b786e03c307f3ad20f507df6d105bdea8c27a
font_01_sfnt_off00012beb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BEB 10296 bytes
SHA-256: d969e624fd2084c00851b8a7a732eac072e2d289a174e4a9d5a745e962fee92c
font_02_sfnt_off000142d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142D9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1